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In message <NBBBJKIECBCGIADLBIHHMELOFOAA.Tonny.Vanmunster@cbabelgium.com >, Tonny Vanmunster <Tonny.Vanmunster@cbabelgium.com> writes >Hi Mike, > >I have used the V1316 Cyg identification (and image) as it appears in the >living edition of Ronald Downes' Catalog and Atlas of CVs. I furthermore >double-checked against the POSS2, and the only thing I can conclude is that >my CCD images do not show any new object compared to both sources. > >You're right regarding the confusion about the true identity of V1316 Cyg >(see also Gary Poyner's website on this). The id in Downes' catalog is based >on a message by Bruce Sumner, that appeared in vsnet-id 263, which I >reproduce hereunder. I guess his 'evidence' is clear. > >Best regards, >Tonny Vanmunster >CBA Belgium Observatory >www.cbabelgium.com > > ><<vsnet-id 263>> >V1316 Cygni identification > >The position of the potential UGSU variable V1316 Cygni shown in >Downes and Shara, PASP, 1993, is incorrect. The real variable is >in fact the faint star (17.58V) some 12 arcsec east of the indicated >star (14.78V). This has been determined from B and V photometry (the >candidate is very blue) and magnitude variation in quiescence, using >photometric data obtained by Henden and Honeycutt for their paper >Secondary Photometric Standards for Northern Cataclysmic Variables >and Related Objects, PASP,109,441,1997. > >The J2000 coordinates and magnitudes of V1316 Cygni, taken from the >Henden & Honeycutt dataset, are: > >20h 12m 13.67s +42d 45' 51.4" V=17.583 B-V=0.252 > >Extreme care will be necessary not to confuse the close 14.8V >companion with the variable, particularly when the variable is faint. > >Regards >Bruce Sumner > > >-----Original Message----- >From: owner-vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp >[mailto:owner-vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp]On Behalf Of >Mike Simonsen >Sent: zondag 21 september 2003 22:18 >To: Tonny.Vanmunster@cbabelgium.com; Taichi Kato; >vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp; >vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp >Subject: [vsnet-outburst 5912] Re: [vsnet-campaign-dn 3953] V1316 Cyg >outburst? -- needs confirmation > > >Tonny, > >There is a bit of disagreement amongst some as to whether V1316 Cyg >is a close companion to the star at 20 12 12.7 +42 45 54 >...or is in fact this star. > >I note that several BAAVSS observers still track observations of this star >as "comp 148". > >My impression has been that this star has been brighter than usual the last >two times I observed it. Hence the note attached to my observation >"CYGV1316 030921.1688 14.6: SXN 148 COMP OR VAR?" > >Sumner identifies V1316 Cyg as- >Position: 20 12 13.67 +42 45 51.4 (J2000, in .dat file) >Magnitude: V=17.583 B-V=0.252 (in .dat file) > >I have no personal stake or strong opinion in the matter. Just thought I >would bring it up, just in case. > >Mike Simonsen Dear Mike and Tonny, I can only confirm that the chart for this variable issued by 'The Astronomer' dated 2001 March 24 does show the identification indicated by Bruce Sumner and not '148' which is shown as comparison F on our chart. Even so it is always possible, given the small separation between F and the variable, that incorrect identifications can occur when studying faint target objects, especially visually. Kind regards, Guy Editor, The Astronomer ---------------------------------------------------------------- Guy M Hurst, 16 Westminster Close, Basingstoke, Hants, RG22 4PP, England. Tel/FAX:(01256) 471074. International +441256471074 MOBILE: (07905) 332226 WWW http://vsnet.theastronomer.org INTERNET: guy@tahq.demon.co.uk OR gmh@ast.star.rl.ac.uk ----------------------------------------------------------------
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